If you want a symlink to appear in the Samba share when a device is automatically mounted you will need to edit the scripts in /etc/usbmount/mount.d and /etc/usbmount/umount.d. Note, use the path to your shared directory, it may be different from mine.

dynamic symlinks

If you want a symlink to appear in the Samba share when a device is automatically mounted you will need to edit the scripts in /etc/usbmount/mount.d and /etc/usbmount/umount.d. Note, use the path to your shared directory, it may be different from mine.